Coil-winding machine



April 7, 1925.

A. H. KCPPWASCH COIL WINDING MACHINE Filed June 23. 1924 2 shets-sheet 1 April 7, 1925.

A. H. KOPPBASCH coin wINDING MAGHINE Filed Juno 23. 1924 2 Sheets-Sheet 2 fili) Patented Apr. 7, 1925., I e. l

vUNITED STATES vPATENTg OFFICE.

.ALEXANDER H. KOPPRASCH, OF CHICAGO, ILLINOIS, ASSIGNOR 'IO ELECTRIC SERVICE SUPPLY CO., OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYL- VANIA.

COIL-WINDING MACHINE.

Application filed June 23, 1924. Serial No. 721,686.

To all whom t may concern.'

Be it known that I, ALEXANDER H. KorrnAsoI-r, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Coil-finding Machines, of which the following is a specilication. v

The invention relates to machines for winding wire coils for dynamo electric lmachines.

One of the objects of' the invention is to provide a machine which may conveniently and accurately be adjusted for winding coils of largely varying dimensions.

Another Objectis to provide a machine which is staunch and substantially unyielding in the constitution of its parts to withstand the strain impressed upon it by the stress of the succeeding convolutions of the wire wound thereon and which is so flexible in adjustment that the parts may be released without material effort, to remove the coil.

Other objects, benefits and advantages will become apparent to persons skilled in the art from a'consideration of the following description when taken in conjunction with the drawings forming a part hereof, wherein Fig. 1 is a side elevation of the machine.

Fig. 2 is a transverse section on line 2-2 of Fig. 1; y

Fig. 3 is a plan View of a Wire holding clamp to engage and hold the beginning end of a coil, showing the clamp open.

Fig. 4 is a similar view, showing the clamp closed.

Fig. 5 is a section taken on line 5-5 of Fig. 3.

F ig. 6 is a plan view of the aforesaid clamp and the head to which it is attached and on which'it has a swivel movement.

Fig. 7 is a central vertical section of a spool-holding head showing the stem out of vertical alignment.

Fin'. 8 is a sectional view showing darts in plan and taken on line S-S of Fig. 7 with the cap removed.

Fig. 9 is an isometric perspective view of a clamping member to hold the spool-engaging stem in vertical alignment.

Fig. 10 is a'section taken on line 10`10 of Fig. 1. Y

Fig. 11 is a section taken on line 11-11 of Fig. 10.

Fig. 12 is a plan view of the spool holding head showing the spool holding stem in section and in vertical alignment corresponding with'Fg. 11.

The machine 12'is shown in side elevation in Fig. 1. It consists generally of a bar 13; in the particular illustration this bar is shown rectangular in cross section, as may be seen in Figs. 2 and 10. Thebar may be round or polyangular to any desired extent.

To each of itsy ends is connected a bracket 14; for supporting a parallel rotatable shaft 15. This shaft is threaded with a right hand and a left handv thread 16 and 17 from its center towards its respective ends.

A driving hub 18 is secured to the midportion of the bar. 13 and provides a center bearing for the threaded shaft 15. The hub 18 is centrally bored and threaded at 19, so that it may be screwed on the head stock 0f a lathe, or like machine, or the concentric out-side surface 20 may be grasped by and held in a suitable chuck.

Between the hub '2O and the respective ends of the machine is a coil supporting head1-21. `There is a pair and they are the same in kind. They are slidable Von the bar 13 and are moved coextensively and always in opposite directions by the screw 15. The

Vscrew may be rotated by the handle 22.

The coil-supporting head 21 is shown in section in Figs. 10 and 11. A cap 23 has an extension '24 whichhas a threaded perforation thru which the threaded shaft 15 passes. This cap is secured to the base block 25 by screws26. Between the block 25 and cap 23 the rod 13 passes and upon which the head 21, as a whole, is slidable. Extending upwardly at right angles from the bar 13 and as an integral part of the base block is a hollow hub 27 to receive another hub 28. These hubs have aligning bores 29 and 29 4to receive a stem 30.

The hubs 27 and 23 each has transversely extending or diametric slots 31. and 32, respectively. A pin 33 passes thru these slots and thru the stem 30. The hub 27 is threaded at 34 and a threaded ring 35 is axially movable over the hub when rotated. The ring has an internal annular groove 36 into which both ends of the pin enters softhat when the ringl is rotated the stem 30 is raised or loivered in its position.

The hub QS" carries on its upper'end a removable tired spool head Si' thru which the stem 3() passes. The stem 30 is reduced in diameter at its upperI end. 3S in which is tormed'a bayonet slot 3S).

A removable spoolhead l() has a central bore Llil ot two diameters thruwhich the upper end of the stem 30 extends. Extending transversely olf ther bore thru the head l() a pin l2 enters the slot 3. and is the other member ot the bayonet joint. The head 4:0 rests on the shoulder 4-3 formed by the tivo diameters oi"- the stein. `ly this means the head 4t) may bev iirmlyl secured to the stem and quickly removed. The coil to be Wound on the device is formed' between and upon the two spaced stems 30-3O and betvveen `the coil 'forming spool heads- BT and 40. The distance these heads 37 and fl() are separated, one from the' other determines the Width' of the coil to be Wound. It: apparent thatthis distance ot' separation may be varied by rotating, the ring 55 in one direction or the'othcr'. The distance the stems 23() are separated, one trom, the other, determines thelength ofvr the coil to `be wound.

`When a coil has'been Wound onv andv ben tween the stems 30-3O it is ditiicult to. remove it Without rotating the screw- 15 in a manner to cause the stems to approach each other when it may be removed after lirst ta'liinfbfoli;1 ythe removable spool head l0. This operation requires that stems 3() must he returned accuratelyto their former positions prior to winding,` :mother coilv ot 'the same length. This operation ifs-fraught with possibility, even probabilityr of' error, due to failure to return the stems invarialil-y 'to their initialv positions.

To release the` tension otV the wires upon the pins 30 Without bodilymoving either o't the heads 21, l provide means permitting one of the stems 30 tov move into an inclined position, as shoivn in Fig. 7.

To'this end IY provide a lateral groove stil into which the upper end. ot the stem 30 is drawn when released. ik' dog" l5 slides radially in the groove and bears against the stem 30.

The sten'rlO is returned to vertical position by a cani 4G made on' the inner surtace oi the rotatable' ringe; et?. The handle lt8 is the means by which the ring' 4f' is rota-ted.

The cam 46 returns the pin tovertical position when the ring; 47 is'rotated to bring the cam 46 into position shoivnin Fig. il, and when itis in'inclined position shovvn in Fig. Z the tension ot the Wires inthe coil is relaxedy and the coil may easily be removed from the stems.

A clamp to which the WireV part constitut-v ing the beginning.. end oi? thei coil to be wound is to be secured consists ol a block 50 having` a slot 5l to receive the wire and a plug` 52 which is rotatable in the bore 53 which bisects the slot. rl`he plug is cut away at one side, at 5l, to provide a wire clamping.member in cooperation vvith the ivall ot the slot 5l when the plug is turned for the purpose by the handle A pin 56 extends into a slot in the plug;l lo prevent the plug,` from leaving the block.

A flat rodl 57 is secured to the block 50. The rod 5T is secured to the clamp ring et? so that strain by pull ot the wire in the holder 50 tends to tighten the clamp 45' engaging the stem 30;

To provide shorter beginning terminals for the coils the rod 57 may be lengthened andv it may be provided with a plurality ot' spaced screw-receiving holes for the purpose.

Having` described my invention what l claim as new and desire to secure by Letters Patent, is

l. A coil Winding machine comprisingl a har, two coil supporting heads slidable thereon, means to adjust the heads toward and :trom each other to vary the'length oli' the coil, a pair oit normally parallel stems one on each head and about which the .coils are to be wound, and means to incline one stem to permit it to be movedout' of parallelism with the other stem to facilitate removal of the coils;

2. A coil winding machine con'iprising a har, tivo coil supporting heads slidatz-le thereon, means to adjust the heads toward and from each other to vary the length of the coil'to be Wound thereon, a pair of normally parallel stems, one on each head, about which thecoils are to. he Wound; means to hold` one stem parallel with the other and movable to release one said stem topermit it' to be inclined toward the other stem to facilitate removal ot the coils therefron'i; a pair ot spool heads surroundingi each stem, betvveenwvhich to Wind and torni the coils, said heads relatively adjustable axially about the-respective stem to accommodate coils of 4different' Widths.

3. In a coil Winding machine havingtwo coil. formingheads, one head comprising,f a hollon7 hub exteriorly threaded and hav- 'ing a diametric slot; a threaded ring'- axially movable on the threadedhub and having an interior annular lgroove; an interior hub, inside ot the threaded hub having' a corresponding` slot, and havingl a spool head on its outer end; a stem pivotedy in the inner hub; a spool head detachably secured to the' outer end of said stem and a pin cxtendine` transversely through said stem and thru the slots oit both hubs into the' groove of said threadedring whereby to separato the spool heads by rotation of said ring.

et. In a coil Winding machine having` two coil forming heads, one head comprisingl a lilo i relatively fixed spool-head structure' hollow hub having a transverse slot; another hub therein having a registering slot and centrally bored; for a stem, and provided with a laterally extending groove; a stem pivoted at its inner end in both hubs, in said axial bore movable into said lateral groove; a spool head detaehably seeured to the outer end of said stem; means ior axially moving said stem and head carried thereby, and means to retain said stem Within said bore and prevent its lateral movement.

5. ln a coil Winding machine having tivo coil forming' heads, one head Comprising a relatively .fixed spool-head structure; an axially positioned stem pivoted therein and movable laterally thereof on said pivot; a removable spool-head on the free end of said stem; means to move the stem and attached spool head axially of said structure, and positive means to move said stem and head into axial positions and to hold them in said positions.

G. In a coil Winding machine having two coil forming heads, one head comprising a ially positioned Vstem therein; a spool-head detachably secured to the outer end of said stem and axially movable with the stem; means to clamp the stem in adjusted posi tion; a rotary cam arranged to operate said clamping means; and a Wire holding' means to hold the beginning end of a Wire of the coil, said means attached to the rotary Cam whereby to tighten the clamping means by stress imparted to the Wire in Winding the coil.

7. In a eoil winding machine having tvve coil forming heads; one head comprising a relatively iixed spoolhead structure; a movable spool-head; a stem secured to the latter head and movable in the former head; a rotatable means for clamping the stem in the fixed structure, and a Wire-holding' means to hold the beginning end of the wire of the coil to be wound, attached to the stem Clamping means.

In testimony whereof I hereunto set in v hand.

ALEXANDER H. KOPPRA SCH. 

